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pentagon [3]
3 years ago
13

To the nearest square metre, calculate the curved surface area of the half pipe if it is 9m long? (With a radius of 2.5m)

Mathematics
1 answer:
Mice21 [21]3 years ago
4 0

Answer:

70.686 m^{2}

Step-by-step explanation:

A=2πrh (area of cylinder without top or bottom)

A = 2\pi(2.5)(9)

A = 141.372

divide by two for half of pipe.

A = 70.686

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What is the equation of the line that passes through the point (-6, -6) and<br> has a slope of 2/3
Volgvan

Answer:

y=2/3x-2

Step-by-step explanation:

y-y1=m(x-x1)

y-(-6)=2/3(x-(-6))

y+6=2/3(x+6)

y=2/3x+12/3-6

y=2/3x+4-6

y=2/3x-2

3 0
2 years ago
Evaluate. -|-2 + 9| i need help
amm1812
Hey there!!

Okay so let's start simplifying this :D

-| -2 + 9|  <---- remember that the "vertical bars" are absolute value signs

Absolute value signs will make any values within them into a positive value even if it was negative in the first place

-|  7 |   <---- first simplify what is within the absolute value signs

<u>- 7</u><u />  <----- this is your final answer!!!


I hope this helps you! ^__^
8 0
3 years ago
Ashley's chocolate bar is 58% cocoa. If the weight of the chocolate bar is 57 grams, how many grams of cocoa does it contain? Ro
Thepotemich [5.8K]

Answer:

33.1 grams

Step-by-step explanation:

You know that 58% of the chocolate bar is cocoa and it weighs 57 grams. All you have to do is multiply 0.58 and 57 together. This will give you the amount of grams of cocoa!

58% = 0.58

0.58*57 grams = 33.06

Round up! 33.06 --> 33.1 grams

6 0
2 years ago
Write the equation 
Shkiper50 [21]
a)\ the\ slope-intercept\ form:\ y=mx+b\\--------------------------\\m=\frac{2}{3}\Rightarrow y=\frac{2}{3}x+b\\\\the\ point\ (-3;\ 6)\Rightarrow \frac{2}{3}\times(-3)+b=6\\\\-2+b=6\ \ \ \ \ |add\ 2\ to\ both\ sides\\\\b=8\\\\\boxed{y=\frac{2}{3}x+8}


b)\ the\ two-points\ formula:y-y_1=\frac{y_2-y_1}{x_2-x_1}(x-x_1)\\-----------------------------\\the\ points:\ (3;-1);\ (5;\ 7)\\\\y-(-1)=\frac{7-(-1)}{5-3}(x-3)\\\\y+1=\frac{7+1}{2}(x-3)\\\\y+1=\frac{8}{2}(x-3)\\\\y+1=4(x-3)\\\\y+1=4x-12\ \ \ \ \ |subtract\ 1\ from\ both\ sides\\\\\boxed{y=4x-13}

3 0
3 years ago
Read 2 more answers
8. Add.<br> 445,976 + 37,415 =
lions [1.4K]
483,391. You can line the, up vertically and then use simple arithmetic and carrying to solve this problem
5 0
2 years ago
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